phys_to_pfn_t: use phys_addr_t

A dma_addr_t is potentially smaller than a phys_addr_t on some archs.
Don't truncate the address when doing the pfn conversion.

Cc: Ross Zwisler <[email protected]>
Reported-by: Matthew Wilcox <[email protected]>
[willy: fix pfn_t_to_phys as well]
Signed-off-by: Dan Williams <[email protected]>

Author: djbw

include/linux/pfn_t.h

@@ -29,7 +29,7 @@ static inline pfn_t pfn_to_pfn_t(unsigned long pfn)
 	return __pfn_to_pfn_t(pfn, 0);
 }
 
-extern pfn_t phys_to_pfn_t(dma_addr_t addr, unsigned long flags);
+extern pfn_t phys_to_pfn_t(phys_addr_t addr, unsigned long flags);
 
 static inline bool pfn_t_has_page(pfn_t pfn)
 {
@@ -48,7 +48,7 @@ static inline struct page *pfn_t_to_page(pfn_t pfn)
 	return NULL;
 }
 
-static inline dma_addr_t pfn_t_to_phys(pfn_t pfn)
+static inline phys_addr_t pfn_t_to_phys(pfn_t pfn)
 {
 	return PFN_PHYS(pfn_t_to_pfn(pfn));
 }

kernel/memremap.c

@@ -150,7 +150,7 @@ void devm_memunmap(struct device *dev, void *addr)
 }
 EXPORT_SYMBOL(devm_memunmap);
 
-pfn_t phys_to_pfn_t(dma_addr_t addr, unsigned long flags)
+pfn_t phys_to_pfn_t(phys_addr_t addr, unsigned long flags)
 {
 	return __pfn_to_pfn_t(addr >> PAGE_SHIFT, flags);
 }

tools/testing/nvdimm/test/iomap.c

@@ -113,7 +113,7 @@ void *__wrap_devm_memremap_pages(struct device *dev, struct resource *res,
 }
 EXPORT_SYMBOL(__wrap_devm_memremap_pages);
 
-pfn_t __wrap_phys_to_pfn_t(dma_addr_t addr, unsigned long flags)
+pfn_t __wrap_phys_to_pfn_t(phys_addr_t addr, unsigned long flags)
 {
 	struct nfit_test_resource *nfit_res = get_nfit_res(addr);